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Miniature sampling flow control device

A flow control device and a miniature technology, applied in the direction of measuring device, sampling device, sampling, etc., can solve the problems of inability to effectively control the flow of sampled gas, uneven adhesion of dust, inaccurate detection results, etc., and achieve easy disassembly and use. Convenience and the effect of reducing the difficulty of detection

Pending Publication Date: 2021-06-01
河南省奥瑞环保科技股份有限公司
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the size of the air channel of the existing air sampling device is fixed, which cannot effectively control the flow rate of the sampled gas. At the same time, when the existing air sampling device is in use, the dust cannot evenly adhere to the sampling cotton. It is difficult and the detection results are not accurate enough

Method used

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Embodiment Construction

[0029] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Apparently, the described embodiments are only some of the embodiments of the present invention, but not all of them. Based on the embodiments of the present invention, all other implementations obtained by persons of ordinary skill in the art without making creative efforts fall within the protection scope of the present invention.

[0030] see Figure 1-Figure 11 As shown, the present invention provides a kind of miniature sampling flow control device, comprises sampling cylinder 5 and vacuum pump 1, and the upper end of described sampling cylinder 5 is open, and the lower end of sampling cylinder 5 is blocked by lower end cap 4, and sampling cylinder 5 and lower end cap 4 can be fixedly connected in the form of a flange; the lower end cover 4 is provided with an emptying port 18, and the ...

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Abstract

The invention discloses a miniature sampling flow control device. The miniature sampling flow control device comprises a sampling cylinder and a vacuum pump. The upper end of the sampling cylinder is open, and the lower end of the sampling cylinder is plugged through a lower end cover. An emptying opening is formed in the lower end cover, supporting legs are arranged at the lower end of the lower end cover, and the emptying opening is connected with a vacuum pump through a pipeline. A flow control mechanism consisting of a pattern plate, a turntable, blades, an arc-shaped rack and a servo motor is arranged in the sampling cylinder. A grid plate located above the flow control mechanism is further arranged in the sampling cylinder, a sampling cotton layer is arranged above the grid plate, a gap exists between the sampling cotton layer and the grid plate, and the edge of the sampling cotton layer is detachably connected with the inner wall of the sampling cylinder in a sealed mode. The size of the flow channel can be freely adjusted, it can be guaranteed that dust is evenly attached to sampling cotton, the detection difficulty is reduced, and the detection precision is improved.

Description

technical field [0001] The invention relates to the technical field of air pumps, in particular to a miniature sampling flow control device. Background technique [0002] Dust sampler refers to a portable device for collecting dust samples in dusty air. It is widely used in disease prevention, environmental monitoring, labor protection, safety supervision, military, scientific research and teaching, metallurgy, petrochemical, railway, building materials and other departments. Hygienic monitoring and evaluation, specially used to determine the average concentration of dust in the air in the workplace of production teams. In the dust sampler, the pre-collector is a separation device of the dust sampler, which is used to collect dust and conduct relevant data analysis on the dust collected through the internal filter of the pre-collector. However, the size of the air channel of the existing air sampling device is fixed, which cannot effectively control the flow rate of the sam...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N1/22
CPCG01N1/2205
Inventor 姜英杰王建平李珂张伟欣陈俊莹刘亚迪李梦飞
Owner 河南省奥瑞环保科技股份有限公司
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